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In a relay race, each contestant run 25.0 m while carrying egg balanced in a spoon, turns around, and comes back to the starting point. Edith runs the first 25.0 m in 20.0 s. on the return trip she is more confident and takes only 15.0 s. what is the magnitude of her average velocity for
a) the first 25.0 m?
b) the return trip?
c) What is her average velocity for the entire round trip?
d) What is her average speed for the round trip?
A small rubber wheel is used to drive a large pottery wheel, and they are mounted so that their circular edges touch. The small wheel has a radius of 2.8and accelerates at the rate of 6.3 , and it is in contact with the pottery wheel (radius 28.0 ..
The rms speed of a sample of gas is increased by 3 percent. What is the percent change in the temperature of the gas? What is the percent change in the pressure of the gas, assuming its volume is held constant?
two beetles run across flat sand starting at the same point. beetle 1 runs 0.46 m due east then 0.75 m at 31o north of
A satellite is in a circular orbit very close to the surface of a spherical planet. The period of the orbit is 1.85 hours. What is density of the planet? Assume that the planet has a uniform density.
Two wires are parallel (heading north-south). The current in each wire is northward. What is the direction of the magnetic field at the location of the right-hand wire due to the current in the left-hand wire? What is the direction of the magnetic fo..
a base for a building column measures 18.0 in. by 18.0 in. on a side and 12 in. high. compute the cross-sectional area in both square inches and square millimeters. compute the volume in cubic inches, cubic feet, cubic millimemters, and cubic mete..
A 1100-kg car pulls a boat on a trailer. What total force resists the motion of the car, boat, and trailer, if the car exerts a 1900-N force on the road and produces an acceleration of 0.550 m/s2 ? The mass of the boat plus trailer is 700 kg.
An explosive is fired from the ground at an angle of 53.1° and a speed of 30.0 m/s. What is the speed of the explosive at the maximum height
A 1.00 kg object is attached to a horizontal spring. The spring is initially stretched by 0.500 m, and the object is released from rest there. What is the maximum speed of the object
Regarding the Earth and a cloud layer 750 m above the Earth as the "plates" of a capacitor, calculate the capacitance. Assume the cloud layer has an area of 1 km2 and that the air between cloud and ground is pure and dry.
A dynamics cart with a force sensor attached is placed on a level track. Attached to the force sensor is a string of negligible mass that passes over a pulley.
A block of mass 8.6 kilogram is pulled along a horizontal frictionless floor by a cord that exerts a force of 42.0 Newton at an angle 24.1 degree above the horizon
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